In BE we couldn't say 'it hits me' in such a case; I find the impersonal construction very inappropriate. We'd say something like - I am very sorry... I was most upset...
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CliveThe versions without the prepositions sound odd to me. I never hear them.
I agree that 'hit me' in this form sounds strange. Perhaps the writer was thinking of the idiom 'It hit me hard', meaning it had a strong impact on me.